US 12,270,413 B2
Compressor housing and centrifugal compressor
Kenichiro Iwakiri, Tokyo (JP); Tadashi Kanzaka, Tokyo (JP); and Yutaka Fujita, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 18/018,144
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Sep. 7, 2020, PCT No. PCT/JP2020/033798
§ 371(c)(1), (2) Date Jan. 26, 2023,
PCT Pub. No. WO2022/049773, PCT Pub. Date Mar. 10, 2022.
Prior Publication US 2023/0272805 A1, Aug. 31, 2023
Int. Cl. F04D 29/42 (2006.01); F04D 17/10 (2006.01); F04D 29/44 (2006.01)
CPC F04D 29/441 (2013.01) [F04D 17/10 (2013.01); F04D 29/4206 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A compressor housing for rotatably accommodating an impeller of a centrifugal compressor, comprising:
a shroud surface including a surface facing a tip of an impeller blade of the impeller with a predetermined gap;
a front-side inner peripheral surface formed on a front side of the shroud surface in an axial direction and disposed outward of a front end of the shroud surface in a radial direction; and
at least one projection protruding from the front-side inner peripheral surface inward in the radial direction,
wherein a rear end of the at least one projection is configured to be connected to the front end of the shroud surface,
wherein the at least one projection is formed in a plate shape, and in a cross-sectional view along an axis of the impeller, has an inclined front edge extending obliquely to the axis of the impeller from a front end of the at least one projection toward a rear side and an inner edge extending from a rear end of the inclined front edge toward the rear side and connected to the front end of the shroud surface, and
wherein the inner edge extends into the shroud surface facing the tip of the impeller blade.